self Maths Puzzle

1,11,21,1211,111221,312211,...?

Read Solution (Total 2)

11=in prev no number of 1 is 1.first 1 represent the total no of one in prev no and second one represent which number.
21=in 11 there are two 1.so 2=total one in 11 and 1=which no that is 1.
1211=in 21 there is one 2 and one 1 so 1(no of 2 in 21)21(no of 1 in 21)1
111221=1(no of one in 1211--concentrate on 1st 1,not the other)11(for 2nd 2 in 1211)2(second 2 of 1211)2(for last and second last 1 )1
312211=3(for 111 in 111221)...
ans>13112221..*****THIS PROBLEM LIKE HUFFMAN CODING******
13 years agoHelpfull: Yes(4) No(0)

Follow the right-to-left order, if the series contains a single number, then take it plus 10. 1 + 10 = 11
IF the series contains 2 identicals numbers which stand next to each other then combine both of them and plus 10: 11 + 10 = 21
Then 21 --> 2+10, 1 + 10 --> 1211
Similarly: 1 + 10, 2 + 10, 11 + 10 --> 111221

And the result is: 21113211
10 years agoHelpfull: Yes(0) No(0)

self Other Question

an unbaised coin is tossed until it shows up the same face in 2 consicative throws wat is the probability that the no of tosses is not more than 4.1)3/4 2)1/4 3)7/8 4)1/8 A veterinarian surveys 26 of his patrons.He discovers that 14 have dogs, 10 have cats, and 5 have fish.Four have dogs and cats, 3 have dogs and fish, and one has a cat and fish.If no one has all three kinds of pets, how many patrons have none of these pets?